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Permission flags from a PDF's encryption dictionary

Source: R/doc.R
pdf_doc_permissions.Rd

Returns the operations the PDF declares it allows. When the document is unencrypted (or was opened with the owner password), PDFium reports 0xFFFFFFFF - every bit set, every operation allowed - and this function returns a named logical vector of all TRUE. For an encrypted document opened with a user password, the bitmask reflects whatever the document author set.

Usage

pdf_doc_permissions(doc)

Arguments

doc

A pdfium_doc from pdf_doc_open(), or a character path.

Value

A named logical vector with the eight flags listed above.

Details

Wraps FPDF_GetDocPermissions. The decoded flags follow the PDF specification's /P (UserAccess) bit assignments (ISO 32000-1 section 7.6.3.2, Table 22):

  • print - bit 3: print the document.

  • modify - bit 4: change content other than annotation / form-field values.

  • copy - bit 5: copy or otherwise extract text and graphics from the document.

  • annotate - bit 6: add or modify text annotations.

  • fill_forms - bit 9: fill in interactive form fields, regardless of modify.

  • extract_for_a11y - bit 10: extract text and graphics for accessibility purposes.

  • assemble - bit 11: insert, rotate, or delete pages and create bookmarks / thumbnails, regardless of modify.

  • print_high_res - bit 12: faithful digital print copy. When FALSE while print is TRUE, the document may print only at low resolution.